I needed to heat the bottles along the score line to get a proper break. Many people suggested using a candle to heat the bottle, the problem was it left soot along the score and didn't seem to have enough heat. When I was a kid my crazy uncle taught me to carve wax figurines for crating pewter molds. He used a denatured alcohol lamp to heat the tools. It was clean and produced a hot flame.
He made his first few, but bought them in the end, but why buy one when you have all the stuff laying around the house.
Step 1: Materials
A baby food jar (glass with metal lid)
shoe string (cotton)
Awl or punch
Block of wood
Step 2: Check the Wick it has to be cotton
If the lace is synthetic it will smoke and melt.
Step 3: Punch the hole and insert the wick
Use the tip of the shoe lace wick to pull it through the hole.
Cut off the tip of the shoe lace wick. Trim the wick length to a inch or so longer that the jar you are using to allow for wick burn off.